Demolish and Rebuild: What Actually Slows You Down
A real Melbourne case study, from planning approval through to the finished design
A knockdown-rebuild sounds simple on paper: remove the old house, build the new one. In practice, the planning process is usually the part that catches people off guard — not the demolition itself. On a recent project in St Kilda, in the City of Port Phillip, planning approval took two years. Here is what actually happened, and why.
Why a Straightforward Application Can Still Take Years
The delay on this project wasn’t caused by a difficult design or an unusual site — it came down to staff turnover at council. Partway through the assessment, the planning officer handling the file left, and the new officer allocated to it had a full backlog. The application sat, effectively parked, until we started following up consistently to keep it moving. This is a genuinely common cause of delay that has nothing to do with the merits of your project, and it’s worth knowing about before you assume a slow response means something is wrong with your application.
What an RFI Actually Involves
Partway through, council issued a Request for Further Information (RFI) — a standard step where the planning officer asks for clarification or additional detail before they’ll proceed. In this case, the concern was about how the new dwelling would sit within the street. We responded directly to that concern, addressing how the design would complement the existing streetscape rather than disrupt it. An RFI isn’t a rejection — it’s a normal part of the process, and how you respond to it matters.
When Flood Requirements Change Mid-Project
Partway through this application, Melbourne Water updated its flood level requirements for the area, which meant the required floor level for the new dwelling had to rise. That created a genuine tension: the site’s allowable building height is measured relative to existing ground level, but the floor now had to sit higher to meet the new flood requirement. Strictly applying the original height limit on top of a raised floor level would have been unreasonable, given the circumstances weren’t within anyone’s control. We negotiated this point directly with council, and the outcome reflected the genuine change in circumstances rather than the original, now-outdated numbers.
Turning a Compliance Problem Into a Design Feature
A raised floor level has a real, physical consequence: the entry now needed steps, and the garage needed a ramp. Rather than treat this as an unfortunate add-on, we designed the entry sequence deliberately — each step formed its own 1.0m × 1.0m platform, creating a gradual, considered rise to the front door instead of a plain flight of stairs. The result reads as an intentional part of the home’s design, not a retrofit forced by regulation. This is often the difference between a compliance requirement handled well and one handled as an afterthought.
Using the Street to Your Advantage
The block itself was narrow, sitting between a single-storey neighbour on one side and an existing three-storey building on the other. That existing three-storey neighbour made a genuine difference to the application — it gave council a real, adjacent precedent for a building of that scale. We backed this up with our own research, identifying other recent three-storey approvals in comparable situations nearby, so the argument wasn’t just "there’s one next door" but "this is an established, approvable pattern in the area." Understanding what’s already been approved around your site is one of the most practical things a good building designer brings to a planning application.
The Practical Side of Demolition Itself
Once approvals were in place, the logistics of the demolition and build itself brought their own list of items to manage: negotiating temporary access with neighbours and replacing boundary fencing with temporary safety fencing for the works; because the site had no existing vehicle crossing, reserving a council-controlled area at the front of the property for trade-only construction parking — at a genuinely significant monthly cost payable to council; and disconnecting all services to the existing dwelling before demolition could begin. None of these are unusual, but they’re also not things most people think to budget time or money for until they’re already underway.
The Real Lesson
None of these issues — staff turnover, a mid-project flood level change, a tight streetscape — were things that could have been predicted with certainty at the outset. What made the difference was responding to each one directly, backing arguments with real precedent rather than assumption, and treating design constraints as problems to solve rather than compromises to accept. And to be clear: this isn’t unique to St Kilda. Similar issues around flood overlays, site constraints and streetscape character come up across many Melbourne suburbs — the details change, but the principle is the same: understand your specific site before you commit to it.
If you’re weighing up a property with a knockdown-rebuild in mind, the Pre-Purchase Planning & Risk Report is designed to surface exactly these kinds of site-specific issues before you buy, not after. You can also read more in the FAQ about planning permits, overlays and the approval process.
Sources: Mancini Design project records for a knockdown-rebuild in St Kilda, City of Port Phillip.